Metric Units
What is the base unit of mass in the metric system?
gram (g)
Which tool measures mass with high precision?
Electronic balance, scale
What does accuracy mean?
Closeness to the accepted value
Convert 1,000 milliliters to liters.
1.0 L
What PPE must always be worn when using chemicals?
Safety goggles
What prefix means 1,000 times the base unit?
kilo
What tool is best for measuring liquid volume accurately?
Graduated cylinder
What does precision mean?
Consistency in repeated measurements
Convert 25 °C to Kelvin.
298.15 K
Where should you look for information about chemical hazards?
SDS
Which metric unit would you use to measure the volume of a water bottle?
liter (L)
What lab device is used to measure the temperature of a liquid?
Thermometer
What type of error happens due to faulty equipment or human bias?
Systematic Error
How many milligrams are in 0.045 kg?
45,000 mg
What’s the proper way to smell a chemical (if instructed)?
Waft
What is the metric unit for temperature used in scientific experiments?
kelvin (K) or °C
This tool measures the length of an object to the nearest millimeter.
Metric Ruler/meter stick
A student measured 97 g for a 100 g object. What’s the percent error?
3.0%
A ruler shows 4.56 cm. How many significant figures is that?
3
Why should you never eat or drink in the lab?
To avoid contamination
Which is larger: 1 cm or 10 mm?
They are equal
This device measures the time it takes for a reaction to occur.
Stopwatch
Why is it important to record uncertainty with a measurement?
To reflect tool limitations/precision
A balance reads 58.3 g for a known 60.0 g mass. Calculate percent error.
2.83%
What should you do first if a chemical splashes in your eye?
Use eyewash station immediately